OST file to PST conversion is possible without any trouble or data loss using the expert-recommended Yota OST to PST Converter Tool. It helps you backup OST file to PST along with all data elements. The tool does not force you to install any additional programs including Outlook to the system.
Quick Steps to Backup OST file to PST are:
Launch the tool and select OST file.
Then click Export and select PST format.
Click on Save button.
You can simply backup the OST file to PST format. Check the manual steps available online you can follow them wisely. To get a wide overview of solutions manual or automated you can read out this article that I found. It explains the process of backup OST files to PST format in both manners. Refer: https://www.softaken.com/guide/how-to-backup-outlook-ost-file/
You can backup my OST file to PST by converting OST files into PST format for this you can take the help of GainTools OST to PST Converter application. It is a Windows-based tool for OST file conversion, backup, and recovery. It is fully automated and user-friendly. It can perform the backup of OST files into PST format in a few quick clicks.